air

AIR

air

(ār),

1. A mixture of odorless gases found in the atmosphere in the following approximate percentages by volume after water vapor has been removed: oxygen, 20.95; nitrogen, 78.08; argon 0.93; carbon dioxide, 0.03; other gases, 0.01. Formerly used to mean any respiratory gas, regardless of its composition.

air

air

Etymology: Gk, aer

the colorless, odorless gaseous mixture constituting the earth's atmosphere. It consists of 78% nitrogen; 20% oxygen; almost 1% argon; small amounts of carbon dioxide, hydrogen, and ozone; traces of helium, krypton, neon, and xenon; and varying amounts of water vapor.

AIR

Aerosolised Iloprost Randomised Study. A trial comparing functional changes caused by iloprost, a stable prostacyclin analogue, to placebo in patients with pulmonary hypertension.Primary endpoint 10% increase in 6-minute walking distance and an improvement in the NYHA functional class.Conclusion Iloprost was better than placebo. Combined clinical endpoint was met by 17% vs. 5% in the placebo group, distance walked in 6 minutes was 36 meters greater, functional class improved, dyspnoea decreased, quality of life increased, and fewer treated patients died or deteriorated. Syncope was similar in both groups.Adverse events Tolerable flushing and jaw pain.

air

The mixture of gases forming the atmosphere of the earth. It consists of about 78% nitrogen, 21% oxygen, 0.1% argon, 0.03% carbon dioxide and smaller proportions of rare gases and ozone. A continuing adequate supply of oxygen is essential to life.

air

(ār)

1. A mixture of odorless gases found in the atmosphere in the following approximate percentages by volume after water vapor has been removed: oxygen, 20.95; nitrogen, 78.08; argon 0.93; carbon dioxide, 0.03; other gases, 0.01. Formerly used to mean any respiratory gas, regardless of its composition.

air

the minuscule vessels that connect the parabronchi in avian lungs, in which there are no blind-ended tubules.

air cell

the air-filled space between the internal and external shell membranes of a bird's egg.

air changes per hour

the standard measurements used to indicate the level of ventilation in a building especially with respect to removal of humidity, noxious gases and carbon dioxide.

air dried

said of feed that is dried in the open with only natural movement of air, e.g. conventional hay. Contains about 10% water.

air filtration

used as a means of reducing contamination inside a building, the efficiency depending on the pore size of the filter. A technique of some value when combined with temperature control in reducing the prevalence of pneumonia in calves in intensive veal producing units.

air flow rates

are important in assessing the suitability of a ventilating system in animal accommodation. Standards for suitable flow rates for different species and age groups for heating and cooling are available.

air gap technique

in radiography, a technique to reduce scatter of radiation by increasing the distance between the patient and the surface of the cassette.

air hunger

a distressing dyspnea affecting both inspiration and expiration which occurs in paroxysms; characteristic of diabetic acidosis and coma. Called also Kussmaul's respiration.

air movement

includes air changes voiding humidity and gases to the exterior plus movements within the space which facilitate cooling.

air passages

the combined air delivery system of the upper and lower respiratory tracts including nasal cavities, pharynx, laryngeal cavity, trachea, bronchi and bronchioles.

air pollution

contamination of the air with deleterious or esthetically unattractive chemical, physical or biological material. Usually reserved for pollutants generated by humans.

air pump

a small electrically driven appliance used to provide a constant stream of air bubbles to aquaria. The bubbles themselves add little oxygen to the water but the constant disturbance of the surface of the water does.

air quality

the determination of air flow rate, temperature, humidity, freedom from bacteria, solid particles, obnoxious effluvia and poisonous gases—especially hydrogen sulfide and methane from sullage pits under the animal accommodation.

air trapping

dilatation of alveoli without destruction of their walls.

air vesicles

extend radially from parabronchi in the lungs of birds and connect with air capillaries, in which gaseous exchange occurs with vascular capillaries.

Patient discussion about air

Q. Are superbugs contagious through the air? Last week we visited my dad in the hospital, and we noticed that on the next room’s door there was a warning sign. After asking, we were told it was a denoting that the patient inside had a superbug (called klebsiella). On our way out we passed against this patient in the hallway – is it possible that I also carry this superbag? Is it dangerous?

A. Usually these bacteria are transmitted from person to person through direct contact, and less through the air. Moreover, these germs are dangerous in ill and debilitated patients, and not in normal healthy individuals.

Q. breating air that has tetrachloroethene in it how does it affect you if u have prostate cancer the air in my building has been determined to have Tetrachloroethylene in it i have just been diagnosed with prostate cancer

A. i found a research they did in Finland about tetrachloroethene, and they saw that amongst the people who were exposed to it over the years there was an increased amount of cancerous events. and even prostate cancer.

Should the Earth survive being incinerated (astronomical and scientific opinion varies on this point), it will then become a dark, airless, frozen cinder as the sun enters the final stage of its star life, cooled and transformed into a dense white dwarf.

Serec Airless Vapor Degreasing systems feature a closed-loop system that uses organic solvents in their vapor or liquid state to clean and fully dry precision metal parts--inside and out--as small as 0.

Sex puts your product into play, whether it's called Weekend in Bologna, from the Gaia Private line which I found in an airless basement corner beneath the Grand Palais, or whether it's something up-scale, like Babyface by Canadian director Jack Blum (a Cannes first-timer) with its promise of a mother-daughter twofer.

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